Capsules are made of drugs in powder or granular form beforehand, and then installed in the capsule shell. There are some differences between the two:
1. Granules usually contain a large amount of sugar in the excipients, after brewing the sweet taste of the liquid, can be very good to mask the odor and irritation of the drug. Usually the proportion of excipients is more than the main drug, a single package of the main drug dose can not be made very large, in addition to sugar, you can also add spices to flavor, generally the most suitable for children to use.
2. Capsules with a smaller proportion of excipients, the contents of the main drug-based, single-package dose of the main drug is larger, suitable for adults. Drugs made into capsules for the same purpose is also able to mask the bad smell of drugs, at the same time, different properties of the capsule shell has a different role, such as:
(1) enteric capsules, in the stomach will not be dissolved, to the small intestine will be dissolved, those in the gastric acid is easy to destroy the drug is appropriate to make in the enteric capsule;
(2) sustained-release capsule or controlled-release capsules: capsule shells are made of special materials, can be slowly or periodically.
The granules are only fast-acting, not slow-acting.